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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2006/T029.pdf
Last checked: 11/14/2016
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Butler, E. L.;
Tredway, L. P. |
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| Author Affiliation: | Department of Plant Pathology, North Carolina State University, Raleigh, North Carolina |
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| Title: | Preventative control of brown patch in creeping bentgrass, 2005 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | F&N Tests. Vol. 61, 2006, p. T029. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Brown patch; Slime mold; Preventive control; Fungicide evaluation; Disease severity; Turfgrass quality; Application rates; Application timing
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| Cultivar Names: | SR-1119 |
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| Abstract/Contents: | "Fungicides were evaluated for control of brown patch in creeping bentgrass putting greens. This trial was conducted at the Lake Wheeler Turfgrass Field Laboratory in Raleigh, NC on 'SR1119' creeping bentgrass maintained under putting green conditions. Mowing was performed 5 times weekly at a height of 0.156-in., raised to 0.185-in.on 20 Jun, with clippings collected, and the site was irrigated to prevent drought stress. Fertility was applied as Coron 18-3-6 (5% Fe + micronutrients) on 25 Jul and 8 Aug (0.25 lb nitrogen/1000 sq ft) and on 13 Jun, 27 Jun, 11 Jul, and 22 Aug (0.125 lb nitrogen/1000 sq ft). Insect pests were suppressed with Dursban Pro (1.5 fl oz/1000 sq ft) on 23 Jun, 21 Jul, and 23 Aug. Plots were 3.33 ft x 6 ft and were arranged in a randomized complete block with four replications. Fungicides were applied in water equivalent to 2 gal per 1000 sq ft with a CO2 powered sprayer at 40 psi using TeeJet 8004 nozzles. All treatments were initiated on 7 Jun and were reapplied at the appropriate intervals as indicated in the table. The experimental area was inoculated on 16 Jun using rye grain infested with Rhizoctonia solani isolates Rh45, Rh46, and Rh47 to encourage disease development. Percent turf area exhibiting brown patch symptoms was assessed on 6 Jul and 16 Aug. Slime mold infection centers were counted in each plot on 6 Jul. Turfgrass quality was evaluated on 16 Aug, using a 1 to 9 scale (9=best, 5=acceptable) based on color, density, and uniformity. Data were subjected to analysis of variance and means separation by Waller-Duncan k-ratio t test (k=100). Brown patch pressure was very erratic during the summer of 2005. No significant differences were detected among treatments on 6 Jul. On 16 Aug, the majority of the treatments were providing significant brown patch suppression except for CL-EXP-4 (1 oz), Heritage 50WG (0.2 or 0.4 oz), Instrata 3.61SE (4.15 fl oz), TM473 (all rates), TM473 480SC + Bayleton 50DF (0.1 + 0.25 oz), Lynx 45WP (0.6 oz), Lynx Flo 1.75F (0.5 fl oz), and Armada 50WP (0.6 oz). Symptoms of slime mold were widespread in the experimental area during June and July. No significant differences were detected among treatments, however, the following treatments exhibited no slime mold symptoms: Instrata 3.61SE (4.15 fl oz), TM473 480SC (0.1 or 0.2 fl oz), TM473 480 SC + 3336 4F (0.1 + 4 fl oz), Lynx 45WP (0.6 oz), Lynx Flo 1.75F (0.5 fl oz), Lynx Flo 1.75F (1 fl oz), and Armada 50WP (0.6 oz). Turfgrass quality was assessed on 16 Aug. Most treatments resulted in inadequate turfgrass quality ratings due to persistent heat and intermittent periods of wet weather during 2005. The following treatments resulted in significant quality improvements compared to the untreated control: Spectro 90WDG (4 oz), Heritage TL 0.8ME + Banner Maxx 1.3EC (1 + 1 fl oz), Heritage TL 0.8ME + Banner Maxx 1.3EC (2 + 2 fl oz), Instrata 3.61SE (2.75 fl oz), Daconil Ultrex 82.5WDG (3.2 oz), TM473 480SC + Daconil Ultrex 82.5WDG (0.2 + 1.8 oz), and TM473 480 SC + 3336 4F (0.1 + 4 fl oz/1000 ft2)." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Butler, E. L., and L. P. Tredway. 2006. Preventative control of brown patch in creeping bentgrass, 2005. F&N Tests. 61:p. T029. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2006/T029.pdf
Last checked: 11/14/2016
Requires: PDF Reader |
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MSU catalog number: SB 951.3 .F82 |
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